A place like the Right Livers' Rest was bound to draw freaks, same as molasses draws flies. 1935, George Goodchild, chapter 5, in Death on the Centre Court: By one o'clock the place was choc-a-bloc.
Respiratory infections as well as infections of certain glands can be a cause of excessive saliva, according to the National Library of Medicine. Children with a cold, influenza or nasal allergies may have excessive saliva and drool.
Expert: Dr. D. Evans replied 7 years ago. Saliva being foamy means that not enough water is present in the saliva. Saliva contains mucoproteins and glycoproteins, when there is not enough water, this can cause foaminess. The most likely cause is simply that you are dehydrated and not taking enough water.